NBC's 'The Sing-Off' is searching for next a cappella singing sensation

NBC's "The Sing-Off" is looking for the best-of-the-best a cappella groups to audition for season three of the hit series. Casting for the vocal competition show has amplified and expanded to five different U.S. cities over seven days to discover the most talented a cappella groups to compete for an opportunity to win a cash prize and a Sony Music recording contract.

Casting call cities and dates are:

Boston
Thursday, May 5
Emerson College's The Paramount Theatre
560 Washington St.
Boston, MA 02111

New York City
Saturday, May 7
SIR Studios
520 W. 25th St.
New York, NY 10001

Nashville, Tenn.
Saturday, May 14
Sir Studios
1101 Cherry Ave.
Nashville, TN 37203

Chicago
Saturday, May 21
Superior Street
2744 Superior St.
Chicago, IL 60612

Los Angeles
Saturday, June 4
Center Staging
3350 Winona Ave.
Burbank, CA 91504

Committed, the second season champions of "The Sing-Off," began their group in 2003 and solidified their sound while attending Oakwood College in Huntsville, Ala. Their versatility and goal to inspire all they encounter placed them on the major stage of NBC's "The Sing-Off" and they recently performed with legendary gospel singer Mavis Staples to honor Gen. Colin Powell at the 2011 NAACP Image Awards. Committed are in the studio recording their debut album set for release this summer.

"The Sing-Off" averaged more than 9 million viewers in its second season to become NBC's second highest-rated reality competition program. "The Sing-Off" features a cappella groups performing popular songs from various genres, arranged and sung such as audiences have never heard before. There is no lip-synching, back-up band or safety net. Ultimately, America decides the winning group.

For the first two seasons, multi-platinum singer Nick Lachey hosted the show and celebrity judges included Nicole Scherzinger, Shawn Stockman and Ben Folds.